Unit 3 Practice Test

Energy due to motion is (a)   energy.

• Kinetic

• Potential

• Energy

• Friction

Gravitational potential energy depends on the (a)   and (b)   of the object.

• Height

• Mass

• Movement

• Friction

What kind of energy is in a rock at the edge of a cliff?

• Potential Gravitational

• Elastic Potential

• Chemical Potential

• Kinetic

What type of energy is in a stretched rubber band?

• Elastic Potential

• Chemical Potential

• Kinetic

• Gravity Potential

At which point is potential energy greatest?

• W

• Y

• X

• Z

When a pendulum swings, at which point is kinetic energy highest?

• 3

• 1

• 2

• 4

When a pendulum swings, at which point is potential energy at its greatest?

• 1

• 2

• 3

• 4

Explain what happens to the potential energy of a rock as it falls off the side of a cliff.

• The potential energy decreases as the kinetic energy increases.

• The kinetic energy decreases as the potential energy increases.

• The kinetic energy decreases as the potential energy decreases.

• The potential energy decreases as the kinetic energy decreases.

Conservation of energy means that energy can neither be created nor destroyed.

• energy can be created but not destroyed.

• energy can both be created and destroyed.

• energy can be destroyed but not created.

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

• 3920000 J

• 294 J

• 180000 J

• 1225 J